Aib heateb



Nov. 8, 1927. 1,647,997

. D, s. JAcoBus AIR HEATER Original Filed June 30, 1922 '7 Sheets-Sheet l- Afa' ' Nov. 8, 1927. l,

D., S. JACOBUS In HEATER original Filed June 50, 1922 '7 sheets-sheet 2 INVENTOR rf sheets-sheet s AIR HEATER D. S. JACOBUS Original File@ June 30, 1922 Nov. 8, 1927.

INVENTOR.

ATTORNEYS.

Nov. 8; 1927. 1,647,997

V D. S. JACQBUS AIR HEATER Original Filed June 50. 1922 '7 Sheets-Sheet 4 ci N I N VEN TOR.

' d- @La A TTORNEYS.

D. s. JAcoBUs Nov. 8, 1927. 1,647,997

AIR HEATER Qriginal Filed June 30, 1922 '7 Sheets-Sheet 5 IN V EN TOR.

A TTORNEYS.

Nov. 8, 1927.

D. S. JACQBUS AIR HEATER original Filed June :50, 1922 Nov. 8, 1927.

D. S. JACOBUS AIR HEATER Original Filed June 50, 1922 7 Sheets-Sheet 7 ranging the flues 14 and 16 vertically, I economize in floor space and provide 'an arrangement by which the soot has a tendency to 'fall away from the walls of the air ducts. The cross flue 15 is preferably made large enough to permit access throughv the door 15a to the upper ends of the gas ducts tor cleaning purposes. By providing a hopper 32, the principal part of the dust which will be deposited on the rst section or' the air heater, can he readily removed as by a screw conveyer 33 without shutting down the heater.

In Figs. 8 to 1l, inclusive, I have shown an arrangement similar to that just described, except that the air ducts, instead of having their edges dii'awn together to form an easy entrance to the gases, are made up ot flat plates held apart at their edges by channelshaped distance pieces 34, ythese channel pieces being omitted at the upper portions ot the air ducts where the cross connection is formed.

In the arrangement shown in Figs. 8 to 11, inclusive, it will be noted that the alternate gas and air ducts are formed between a series of parallel plates spaced apart in the respective fines and entrance to the gas ducts will be obtained by omitting the separating pieces 34 between alternate ducts at the point of entrance to the gas ducts of the air heater. The same arrangement will also be used at the gas exit.

In the arrangement illustrated in Figs. 12 to 19, inclusive, the ducts are termed, of sheets riveted at their edges and in connection with the illustration oi' this modification, I have shown the air heater applied to a boiler in a somewhat modified manner. In Fig. 12, the boiler 36 has an economizer 37 and an underfeed stolzer 38 to which air may be supplied through the ducts 39. In a manner similar to that heretofore described, the air is forced intothe air heater through the air inlet duct 40 by a fan 41 and after passing through the air heater, `flows through the ducts 39 to the furnace. Similarly, the furnace gases are drawn through the boiler, economiser and air heater by a 'fan 42 and a stack 43. the gases flowing from the air heater through an outlet flue 44.

rlhe air heater is made up of a. pair of vertical flues 45 and 46 having therein a series ot ducts made up of sheet metal walls 47 spaced apart and held at their edges in the manner heretofore described and preferably having spacing members 48 between their side walls. In this'form ot my invention, the edges oit the sheets are not bent as hereinbefore described, but are iormed as best shown in Fig. 19, which is a perspective view ot the portion of the air and gas ducts at the upper part of the gas inlet shown in Fig. 12. At this point, a beam 49 extends across the air heater, and in the arrangement shown, a'channel 50 is attached to the lower side of this beam to support the ducts. In the form illustrated, each duct is made up of a :dat sheet metal plate 51 and similar plate 52 having its edges bent, as shown at 53 and 54, to provide a spacing portion and a fastening portion, the portion 54 being riveted to the edges of the plate 51, aS shown in the completed ducts at the left of Fig. 19. Member 55 may be provided between the several ducts to stiii'len the edges of the plates at the entrance and exit openings of the ducts and also to provide an additional means of attaching the ducts to the support, such as the channel 50.

In the arrangement shown in Fig. 12, the construction ot the ducts by which the horizontal connection is made between the two sets of vertical. air yduits is shown in Figs. 15, 16, 17 and 18. A. channel 56 supported in any suitable manner may form the upper part of this horizontal connection, and the upper edges o1" the plates .i1 and 52 maybe notched, as shown, to extend around the edge ci the channel Between alternate plates is placed the spacing member 57, having upturned fianges 58, 58 to which the upper edges ot the plates 50 and 51 `may be riveted, this distance piece 57 also serving to close the upper ends of alternate ductsto divert the air or in such ducts into a horizontal path. In the space between the plates 5G and 51, not provided with. the distance pieces 57, the part oita the plete whifh is cut out to form the notch, as 58, may be bent down and 'fastened to the channel 5G to hold the ducts formed ot the plates 5() and 51 in spaced relation. It will be understood, as shown, that in this case the several plates or distance pieces are riveted together along their edges.

It desired, the distance pieces 57 and the vmembers at the gas and air inlets may be lilled up with any suitable plastic material to 'form a shape somewhat lil-:e that shown in Figs. 18 and 17 .at 6() and in Fig. 13 at 60. This provides a flared and therefore a relatively easy entrance to the several gas pasnges termed between the air ducts or to the air ducts between the several gas passages. This iller material should preferably be oi" sonic` cement-like substance which would set permanently and .not disintegrate under heat.

It will be unnetessary to describe the method of operation ot the arrangement shown in Fig. 12 which is substantially the same as tha-thereto'tore described with the arrangement shown in Fig. 1.

lVhile I have shown the gas as entering the ducts at an angle and leaving the same at an angle, it will be obvious that the Vcondition may be reversed, so that the air will enter and leave at such an angle, and indeed, it desired, my air heater may be ar- Ranged, ee 'thai Jhe ad "1' gee may enter leave at an ang e the mam dreetlen of devee may be z e s of ver melia weh :2-fange: ienne-e sei b xili emmene@ e uy f 1 pel mms, l me e 1e n e malin alle e'weif he upper peygeue o" the dude, a niet eenexd perge lower "i ene ei' 'l :l main C; Y lvey Jue the iev-rer end peru Ve dueis f Seid mai and a@ nem for hzmejffeifng heat from We ffef; eif vertically di ange duf-te, :ich eet eemprspaz 1 @1l-eige arranged mme duets of each 'i eet being e e l@ xppgl L M/zelO/EL Ml el- J QUCLS, a nza-n eh mlet emi mm1 gas outlet cenmedie/dY yeepeewelj *fe he lever em' pel-Mens e? :diei-nnte ducts eit one e'C 11d sete and a mam mr endet and, mm 1 mle; eimm' le bei sap Vey te opposite e@4 Y ef said hezmbed'lzmglje duece. @f5

6. En L device fer i 1 het ggzwes 'to air, e plm heut-exchange duets ezuh e" i. nel metallic side edge ef ai' lemmi' the duet bein und cenneee"i due'e me held si y L0 ewn pas. @jee betweel lei and eiidei dueu le Opposite emi p:

main glue miei: and eufLeq' @ver thereof. 110

'i'. l'n e device fe het g, es ie all', Dese@ heee-exchange nmalel letae )lates Spee/ee. their Sie edges new" t0 ich oh hwing one 0 duess el? each Se s weed pei te Y ihe duets of each Set neeed reepeetvelJ-f thereof, main uh' nem neeted respee'tvey ai' 'he of euch set of Said duets m' and ouledues eennee'ed refp All'.

lowel' ends of each ef said hues. 8. n a dence ei" 'Uf E side edges bent toward and connected to each other, a pair oi? vertical tlucs, each having' apart to ilorm pat-sapjes between them, the

ducts ci" each set and the lines being,` connect-ed ref-ipeftively at the upper portions thereof, in air inlet and outlet ducts connected resp tively at the loweil end portions ott each oit said ducts and main gas inlet and outlet duets connected respectively ai' the lower ends oi each of said tlues, with the air inlet and the gas outlet adjacent, whereby the g, s and the air flow in opposite directions through the heat-transfer device and the tlows downward toward the gas outlet.

9. ln a device tor transferring heat from het gases to air, two sets ot vertically disposed heat-exchange ducts, formed ot parallel metallic plates spaced apart with their side edges bent imrard and connected to each other, a pair ci vertical tlues, each havinp` one oit said sets of ducts therein, the chiots oit each set being,` held side by side and spaced apart to form passages between them, the ducts ot each set and the lues being connected respectively at the upper portions thereof, main air inlet and outlet chiots connected respectively at the lower end portions et each oi' said ducts and main gas inlet and oiitlet chiots connected respectively at the lower ends of each ot said Vfines, the main air ducts being4 connected to the sides of the heat-exchange ducts.

il). ln a device for translerring` heat troni het gases to air, two sets oit vertically disposed heat-exchange ducts, formed of parallel nietellic plates spaced apart, the side edges oit at least some otl the plates beinp' bent toward an adjacent plate and connected thereto, a pair ot vertical tlues, each havin@ one olf said sets rlncts therein, the ducts or being` held side by side and spaced to torni passages between them, each At being,` closed the top and having,` a connection. with a duct oit the other set through its side a point adjacent its top and the iiues lniviifigi` their tops connected by a connectinp,` tine above the tol s of the ducts. ln a device tor transferring` heat troni hot to air, two sets of vertically disposed treat-exchange ducts, itorined of parallel metallic plates spaced apart, the side edpjcs et' at learL some c'i the plates being' bent toward an adjacent plate and connected thereto, a pair et vertical titles, each having' one o said sets et' ducts therein, the ducts oi each set being` held side by side and spaced Y to torni passages between there, each duct being; closed at the top and having a connection with a duct ot' the vother set through side at a point adjacent its top and the tlues having their tops connected by a connecting flue above the tops of the dn`cts,.said connecting flue having doors and being` of sul'ieient size to permit access to the spaces between the ducts, whereby the outer walls thereot may be freed trom soot.

l2. ln a device for transferring heat from hot `gases to air, a heat-exchange duct composed ot relatively long` and wide parallel, metallic plates spaced apart with a relatively short distance hetween them and a plurality et spacing devices located within the boundaries ot the plates and connected only to said plates to prevent said plates moving,r apart, said devices having portions between the plates to prevent said plates moving together, whereby the plates are maintained in parallel relation, and means at the edges or' the plates to maintain the duct in position.

13. ln a device for transferring heat from hot gases, a heat-exchange duct having two parts extending in a generally vertical direction, each part being` composed or' a pair otrelatively long and wide metallic plates spaced apart and the plates ot' the two parts being placed end to end to form a continuous duct, the lower of said parts being shorter than the upper, and means connected to the edges of the plates to maintain the parts in alineinent.

lll- 'In a device for transferring heat troni hot gases, a heat-exchange duct having two parts extending` in a generally vertical direction, each part being composed of a pair ot relatively long and wide metallic plates spaced apart and the plates of the two parts being placed end to end to form a continuous duct, the lower of said parts being shorter than the upper and et a different metal, and means to maintain the parts in alinement.

l5. In a device for transferring heat from hot Lgases to a`r, two sets ot connected heatexchange ducts, one ot which is substantially vertical, lues in which said chiots are maintained in spaced relation, and the two sets in alignment, and a `njas outlet and an air inlet in the lower one ot' the sets, whereby the gas Hows downward and the air iows upward in said sets of ducts.

16. In a device tor transferring heat Jfrom het gases to air, two sections ot connected heat-exchange ducts extending` in a generally vertical direction, tlnes in which said ducts are maintained in spaced relation, and a gas outlet and an air inlet in the lower one ot said sections, whereby the gases and the air flow in opposite directions through the device, the section containing the gas exit being` located so that moisture collected thereon will gravitate away from the other section.

17. ln a device tor transterring heat from hot gases to air, a plurality of long and wide heat-exchange ducts, each formed oit a pair of parallel metallic plates spaced apart, the side edges ot at least one plate at each side of the duct being bent toward the other plate and conneeecl; thereto, aL flue in which said ducts are held Side 1oy side and. spaced apart to form passages between them, marin gas inlet and ourlet duets connected respectively lo opposite end portions of Said., flue and main air inlet and outlet duets connected respectively to opposite end portions of euch of said heatfezehange duete, Said main gas nlel being Connected to one Side of an end portion of Said flue and Said flue having an extension on the oppoete side of the duets from said gas inlet and unoccupied by said nir duets., whereby a Clust pocket is formed in sai/el flue to receive dust from the Hue gases.

DAVID S. JCOBUS. 

